# Airworthiness Directives; Dassault Aviation Airplanes
> **Rule** · Final rule; request for comments. · Published 2013-04-19 · Effective 2013-05-06 · 78 FR 23458
## Document
- **Document number:** 2013-09108
- **Category:** airworthiness
- **Manufacturer:** Dassault Aviation
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 78 FR 23458
- **Publication date:** 2013-04-19
- **Effective date:** 2013-05-06
- **FAA docket:** Docket No. FAA-2013-0306
## Abstract

We are adopting a new airworthiness directive (AD) for all Dassault Aviation Model FALCON 7X airplanes. This AD requires revising the aircraft flight manual (AFM); performing operational tests of the oxygen mask oxygen assembly; and replacing affected stowage boxes, which terminates the AFM revision and operational tests. This AD was prompted by failure of the flight crew oxygen supply due to a potentially defective flight crew mask oxygen assembly. We are issuing this AD to prevent failure to supply oxygen upon demand to the flight crew in flight in "100%" and "Emergency" modes, which, in an emergency, may result in incapacitation of the flight crew.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/04/19/2013-09108/airworthiness-directives-dassault-aviation-airplanes)
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